Oliveira, M. C. A. de, J. Moreira, and F. L. Naves. “PLANNING AND OPTIMIZING THE TREATMENT OF WASHING WATER OF OILY SLUDGE FROM OIL REFINING BY OZONATION”. Revista Brasileira De Ciências Ambientais, no. 47, Apr. 2018, pp. 24-34, doi:10.5327/Z2176-947820180191.